A 1TB microSD card is as insane as it sounds, but wait for it to get cheaper

How much data can you store on a 1TB microSD card?

That's no doubt the first question everyone is going to ask. What on Earth would you need a 1TB micro SD card for? If you're asking, you probably don't need it.

But if you'll allow your head to run wild for a little, you can quickly come up with many ways to fill up the memory card. 

It goes without saying, a 1TB micro SD card is perfect for digital hoarders who prefer to not delete any files. Like ever.

I've outlined a general overview of how much digital stuff you could store for various common file types:

1. About 1,000,000 e-books (at an average size of 1MB per e-book)

2. About 200,000 photos (12-megapixel iPhone XS Live Photos at an average size of 5MB) or 500,000 photos (12-megapixel iPhone XS photos at an average size of 2MB)

3. About 250,000 iTunes songs (at an average size of 4MB for an average 4-minute tune)

4. About 222 Full HD movies from iTunes (at an average of 4.5GB per movie)

5. About 41 Blu-Rays (at an average size of 25GB)

6. About 31 Nintendo Switch digital games (at a top capacity of 32GB per game; most games that aren't as massive as The Legend of Zelda: Breath of the Wild usually use between 5-10GB of storage, which would work out to about room for 100 to 200 games, respectively)

Of course, few people are likely to use the micro SD card for storing one type of file so how much you'll store will vary.

How fast are the read and write speeds?

A ton of storage is mind boggling, but not very useful if it can't read and write data quickly enough.

SanDisk says the 1TB micro SD card can achieve read speeds of up to 90MB/s. Running Blackmagic's Disk Speed Test on a 2019 iMac, the results matched the advertised speeds.

According to my Disk Speed Test results, the 1TB micro SD card plugged into the iMac (via a generic SD card adapter) was capable of write speeds up to 60MB/s and read speeds up to 90MB/s.

The read and write speeds are slow in comparison to my Samsung T1 SSD, which gets read and write speeds up to 450MB/s over USB 3.0. My 1TB Western Digital My Passport for Mac portable hard drive has faster read and write speeds of 100MB/s and 105MB/s, respectively.

Newer portable SSDs like Samsung's T5 can also achieve read and write speeds up to 540MB/s via USB 3.1 Gen 2 and the Samsung X5 can transfer data at a ludicrous speed of up to 40GB/s over Thunderbolt 3.

Though slower than my portable SSDs, the 1TB microSD wrote about two more megabytes faster than Lexar's 1TB SD card; read speed was the same 90MB/s despite Lexar claiming up to 95MB/s.

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